* {
    position: relative;
    box-sizing: border-box;
  }
  
  html,
  body {
    height: 100%;
  }
  
  html {
    background-color: #000;
  }
  
  body {
    overflow: hidden;
    color: rgba(255, 255, 255, 0.5);
    font-family: "Russo One", arial, sans-serif;
    line-height: 1.25;
    letter-spacing: 0.06em;
  }
  
  .hide {
    opacity: 0;
    visibility: hidden;
  }
  
  .remove {
    display: none !important;
  }
  
  .blur {
    filter: blur(12px);
  }
  
  .container {
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  .loading-init {
    width: 100%;
    align-self: center;
    text-align: center;
    text-transform: uppercase;
  }
  .loading-init__header {
    font-size: 2.2em;
  }
  .loading-init__status {
    margin-top: 1em;
    font-size: 0.8em;
    opacity: 0.75;
  }
  
  .stage-container {
    overflow: hidden;
    box-sizing: initial;
    border: 1px solid #222;
    margin: -1px;
  }
  @media (max-width: 840px) {
    .stage-container {
      border: none;
      margin: 0;
    }
  }
  
  .canvas-container {
    width: 100%;
    height: 100%;
    transition: filter 0.3s;
  }
  .canvas-container canvas {
    position: absolute;
    mix-blend-mode: lighten;
    transform: translateZ(0);
  }
  
  .controls {
    position: absolute;
    top: 0;
    width: 100%;
    padding-bottom: 50px;
    display: flex;
    justify-content: space-between;
    transition: opacity 0.3s, visibility 0.3s;
  }
  @media (min-width: 840px) {
    .controls {
      visibility: visible;
    }
    .controls.hide:hover {
      opacity: 1;
    }
  }
  
  .menu {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: rgba(0, 0, 0, 0.42);
    transition: opacity 0.3s, visibility 0.3s;
  }
  .menu__inner-wrap {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    transition: opacity 0.3s;
  }
  .menu__header {
    margin-top: auto;
    margin-bottom: 8px;
    padding-top: 16px;
    font-size: 2em;
    text-transform: uppercase;
  }
  .menu__subheader {
    margin-bottom: auto;
    padding-bottom: 12px;
    font-size: 0.86em;
    opacity: 0.8;
  }
  .menu form {
    width: 100%;
    max-width: 400px;
    padding: 0 10px;
    overflow: auto;
    -webkit-overflow-scrolling: touch;
  }
  .menu .form-option {
    display: flex;
    align-items: center;
    margin: 16px 0;
    transition: opacity 0.3s;
  }
  .menu .form-option label {
    display: block;
    width: 50%;
    padding-right: 12px;
    text-align: right;
    text-transform: uppercase;
    -webkit-user-select: none;
       -moz-user-select: none;
        -ms-user-select: none;
            user-select: none;
  }
  .menu .form-option--select select {
    display: block;
    width: 50%;
    height: 30px;
    font-size: 1rem;
    font-family: "Russo One", arial, sans-serif;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 0.06em;
    background-color: transparent;
    border: 1px solid rgba(255, 255, 255, 0.5);
  }
  .menu .form-option--select select option {
    background-color: black;
  }
  .menu .form-option--checkbox input {
    display: block;
    width: 26px;
    height: 26px;
    margin: 0;
    opacity: 0.5;
  }
  @media (max-width: 840px) {
    .menu .form-option select, .menu .form-option input {
      outline: none;
    }
  }
  
  .close-menu-btn {
    position: absolute;
    top: 0;
    right: 0;
  }
  
  .btn {
    opacity: 0.16;
    width: 50px;
    height: 50px;
    display: flex;
    -webkit-user-select: none;
       -moz-user-select: none;
        -ms-user-select: none;
            user-select: none;
    cursor: default;
    transition: opacity 0.3s;
  }
  .btn--bright {
    opacity: 0.5;
  }
  @media (min-width: 840px) {
    .btn:hover {
      opacity: 0.32;
    }
    .btn--bright:hover {
      opacity: 0.75;
    }
  }
  .btn svg {
    display: block;
    margin: auto;
  }
  
  .credits {
    margin-top: auto;
    margin-bottom: 10px;
    padding-top: 6px;
    font-size: 0.8em;
    opacity: 0.75;
  }
  .credits a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
  }
  .credits a:hover, .credits a:active {
    color: rgba(255, 255, 255, 0.75);
    text-decoration: underline;
  }
  
  .help-modal {
    display: flex;
    justify-content: center;
    align-items: center;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    visibility: hidden;
    transition-property: visibility;
    transition-duration: 0.25s;
  }
  .help-modal__overlay {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    opacity: 0;
    transition-property: opacity;
    transition-timing-function: ease-in;
    transition-duration: 0.25s;
  }
  .help-modal__dialog {
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 400px;
    max-height: calc(100vh - 100px);
    margin: 10px;
    padding: 20px;
    border-radius: 0.3em;
    background-color: rgba(0, 0, 0, 0.4);
    opacity: 0;
    transform: scale(0.9, 0.9);
    transition-property: opacity, transform;
    transition-timing-function: ease-in;
    transition-duration: 0.25s;
  }
  @media (min-width: 840px) {
    .help-modal__dialog {
      font-size: 1.25rem;
      max-width: 500px;
    }
  }
  .help-modal__header {
    font-size: 1.75em;
    text-transform: uppercase;
    text-align: center;
  }
  .help-modal__body {
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    margin: 1em 0;
    padding: 1em 0;
    border-top: 1px solid rgba(255, 255, 255, 0.25);
    border-bottom: 1px solid rgba(255, 255, 255, 0.25);
    line-height: 1.5;
    color: rgba(255, 255, 255, 0.75);
  }
  .help-modal__close-btn {
    flex-shrink: 0;
    outline: none;
    border: none;
    border-radius: 2px;
    padding: 0.25em 0.75em;
    margin-top: 0.36em;
    font-family: "Russo One", arial, sans-serif;
    font-size: 1em;
    color: rgba(255, 255, 255, 0.5);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    background-color: rgba(255, 255, 255, 0.25);
    transition: color 0.3s, background-color 0.3s;
  }
  .help-modal__close-btn:hover, .help-modal__close-btn:active, .help-modal__close-btn:focus {
    color: #FFF;
    background-color: #09F;
  }
  .help-modal.active {
    visibility: visible;
    transition-duration: 0.4s;
  }
  .help-modal.active .help-modal__overlay {
    opacity: 1;
    transition-timing-function: ease-out;
    transition-duration: 0.4s;
  }
  .help-modal.active .help-modal__dialog {
    opacity: 1;
    transform: scale(1, 1);
    transition-timing-function: ease-out;
    transition-duration: 0.4s;
  }